Singleplayer:
Excellent Halo, but a really weirdly executed story.
I'm not sure if the sort-of reverse story telling really worked, since apparently a bunch of shit happened off screen before the game.
The open world stuff doesn't really work, so here's hoping they sack it off, or improve it.
Multiplayer:
Cracking Halo.
Weird battlepass, with silly challenges.
I dunno how much longevity it has, but I'm having a great time right now.